Heliconius charithonia is one of the species of butterflies whose wing patterns scientists scrutinized to better understand the evolutionary process. This butterfly is wild-type; the genetically ...

Butterfly patterns appeal to him because, though they're ornate, they exist on a simple canvas: Unlike the architecture of our hearts or brains, butterfly markings are confined to essentially two ...

A color-changing biohybrid hydrogel was used to make a 3-D robotic butterfly, which appeared to flap its wings as color shifted from the outer edge and spread to the inside of the wings. F. FU ET AL.

The trick is printing the liquid in precise, microscale patterns that create structural color. Structural colors arise from the way different wavelengths of light bounce off microscopic ...